Slow cooker



FIG. 1 is a perspective view of a slow cooker showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a top plan view thereof

The broken line showing of the remainder of the slow cooker is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a slow cooker, as shown and described. 